Al-Mustansir I

al-Mustansir I (17 February 1192-5 December 1242) was the Abbasid Caliph from 10 July 1226 to 5 December 1242, succeeding az-Zahir and preceding al-Musta'sim.

Biography
al-Mustansir was the son of az-Zahir, and he became Caliph in 1226. al-Mustansir's reign was uneventful, but he built a lasting legacy for himself when he built Mustansiriya Madrasah on the left bank of the Tigris River. He died in 1242.